for a second term as president of the united states. tell the audience essentially that we're all on a journey together, that progress has been made and he urged everyone in the hall to build on it. mrs. obama and the obama's daughters malia, age 14, who started high school this week. and sasha, of course, age 11. and here is joe biden and his wife, dr. jill biden joining the obamas. bob schieffer, a classic barack obama speech but there was one line in particular that i heard that i'm not sure i have ever heard a president say. he said, "i'm proud of what we've achieved together, but i am far more mindful of my own failings." >> reporter: yeah, and i think that was an effort to say to people and to answer people who talked about, you know, that he had called for hope and change and he had built up people's hopes, and maybe beyond expectations that he could actually deliver on. it was a speech that did, as we were told it would, draw contrasts between these two very different visions for america. but this was not-- this was not the kind